Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bc9cfa4d7f7cd3ebe6fca684a104a600431b3ef1aef17bb0bffbe25b42f5ff2' 
  AND token = 'HsGJYW5K0shb3R8tPCEi1RfQ6YQAdhVwDMnBxTxN5C8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}